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Related Concept Videos

Role of Matrix Metalloproteases in Degradation of ECM01:23

Role of Matrix Metalloproteases in Degradation of ECM

Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult body.
A...
The Bone Matrix01:18

The Bone Matrix

Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in acid or...
Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
The Extracellular Matrix01:29

The Extracellular Matrix

Overview
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
The Extracellular Matrix01:42

The Extracellular Matrix

In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.Composition of the Extracellular MatrixThe extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse molecules.
Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.

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Related Experiment Video

Updated: Jul 5, 2026

Bacterial Expression and Purification of Human Matrix Metalloproteinase-3 using Affinity Chromatography
07:32

Bacterial Expression and Purification of Human Matrix Metalloproteinase-3 using Affinity Chromatography

Published on: March 30, 2022

Matrix metalloproteinases and bone.

Stephen M Krane1, Masaki Inada1

  • 1Department of Medicine, Harvard Medical School and the Massachusetts General Hospital, Center for Immunology and Inflammatory Diseases, Building 149 13th Street, Room 8301, Boston. MA 02129, USA.

Bone
|May 20, 2008
PubMed
Summary
This summary is machine-generated.

Matrix metalloproteinases (MMPs) are zinc-dependent enzymes crucial for bone and cartilage. Mutations in MMP genes reveal their vital roles in skeletal development and remodeling throughout life.

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Detection of Functional Matrix Metalloproteinases by Zymography
09:30

Detection of Functional Matrix Metalloproteinases by Zymography

Published on: November 8, 2010

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Last Updated: Jul 5, 2026

Bacterial Expression and Purification of Human Matrix Metalloproteinase-3 using Affinity Chromatography
07:32

Bacterial Expression and Purification of Human Matrix Metalloproteinase-3 using Affinity Chromatography

Published on: March 30, 2022

Detection of Functional Matrix Metalloproteinases by Zymography
09:30

Detection of Functional Matrix Metalloproteinases by Zymography

Published on: November 8, 2010

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Skeletal Biology

Background:

  • Matrix metalloproteinases (MMPs) are zinc-dependent proteolytic enzymes.
  • Several MMPs are highly expressed in mammalian bone and cartilage.
  • These MMPs can cleave native collagens, suggesting collagenase activity in vivo.

Purpose of the Study:

  • To review the functions of MMPs in skeletal biology.
  • To explore the roles of MMPs in endochondral ossification and bone remodeling.
  • To discuss insights gained from genetic mutations in MMPs and collagen.

Main Methods:

  • Review of existing literature on MMPs in skeletal tissues.
  • Analysis of spontaneous mutations in human MMP genes.
  • Examination of targeted mutations in mouse Mmp and collagen genes.

Main Results:

  • MMPs play significant roles in embryonic endochondral ossification.
  • MMPs are involved in postnatal bone modeling and remodeling.
  • Genetic studies in humans and mice have elucidated specific MMP functions.

Conclusions:

  • MMPs are essential regulators of skeletal development and maintenance.
  • Understanding MMP functions is critical for skeletal health research.
  • Further investigation into MMP mechanisms is warranted.